Perfect for joggers, the zap blast knuckles extreme features 4 ultra-sharp spike electrodes which offers extra protection and dna collection for the authorities.It is rubber coated with soft contour grip for full control.It also has a red led on/off indicator.Includes two (2) lithium cr123a batteries and heavy nylon case with belt clip.Range: Close ContactRepels: AttackerMaterial: RubberColor: BlackVolt: 950,000